Finding the Third Proportional to 258,498 and 372,316.50

Step by Step Solution

1. Step 1: Write the proportion equation
   258,498 : 372,316.50 = 372,316.50 : x
2. Step 2: Convert to fraction form
   258,498/372,316.50 = 372,316.50/x
3. Step 3: Cross multiply
   258,498x = 372,316.50 × 372,316.50
4. Step 4: Simplify right side
   258,498x = 138,619,576,172.25
5. Step 5: Solve for x
   x = 138,619,576,172.25/258,498
6. Step 6: Final answer
   x = 536,250.09